Door for excavating dippers and the like



Dec. 27,l 1927. Y `1,653,620

J. OF. CLARK Doon Fon EXGAVATING DIPPERS ANDTHE LIKE Filed Jan. 5, 1925 2 Sheets-Sheet 1 Dec. 27, 1927. K' 1,653,620

J. oF. CLARK y DOOR FOR EXCAVATING DIPPERS AND THE LIKE Filed Jan. s, 19:25 2 sheets-sheet 2 vl 1 lm '1v LTU/aw TQM@ Patented Dee 27, 1927."

UNITED STATES PATENT ori-loafA JOHN O'EALLONCLAEK, or CHICAGO HEIGHTS, ILLINOIS, AssIGNon To AMERICAN MANGANESE STEEL COMPANY, OE CHICAGO, ILLINOIS, A CORPORATION OE MAINE.

Doon Eon ExCAvAT'ING nrrrEns AND THE LIKE.

Application med January vI5, 192,5. Serial No. 544.

This invention relates to excavating apparatus in which a dipper, bucket, scraper, or other receptacle for materials to be dislodged and convcyed,- is provided with a hinged' door/held closed by a latch vthat is releasable at will to discharge the contents.

Receptacles of this kind are subjected to' very severe usage, and difficulty has been experienced 1n vmaintaining the door 1n 19 serviceable condition, some of these diffi-4 culties arising from distortion or warping of the door under the heavy loads which it ist ing manganesesteel, is designed with deep.

ribs substantially perpendicular to the plane of the door, which extend -transversely and longitudinally of the door and meet, preferably integrally, to render them inter-susytaining; and to so 'designV those of the strengthening ribs which extend in the direction of hin e attachment that they will receive and em race the arms of the hinges.

and confine the hinges-relatively to 'the door and perpendicular to the plane of the door, with t-he result that the rivets or bolts which hold the hinges and door in assembly are Wholly relieved from stresses which tend to tear them out.

Another object ofthe invention is to provide a latching mechanism for doors of the kind' described, which will serve for a longer time by reason of having the bolt and latch reversible in position, more readily assembled, and therefore cheaper to replace when parts are Worn, and more durablefin use because of the construction and organization inherent in itsv parts; the frame-like reinforcing webs on the door being utilized for mountinl thelatch mechanism. I-

In or er that the invention may be fully understood, the preferred embodiment therein directions which are both parallel withy directions.

of will be described in connection withr the accompanying drawings, in which- Figures 1 and 2 are, respectively, a side elevation and a fragmentary vertical section of an excavating dipper to which the several features of the present invention are applied. Figure 3 is a bottom plan view of the .dipper shown in Figures 1 and 2.

Figure 4 is a section on the line 4*-4 of Figure 3.

.Figure 5 is a front end elevation of the dipper as seen from the right of Figure 1.

' Figure 6 is a detailview of the reversible latch bar; and.

, Figure 7 is a detail view of a'replaceable pillow block through which the portion of the latch bar near its locking end enters into bearing against the door.O

1 represents the body of an excavating dipper, 2 a door mounted thereon through.

the medium of hinges 3 having their pintles at 4, and 5 represents a latch bar carried by the door and coacting with the keeper 6 upon the dipper 1 to "keep the door closed.

.Hinges 3' are of the offset arm type deslgned to effect a substantial Offset of the door 2 from their pintles 4, so tliat the pintles .can be located at intermediate'po-ints on the dipper body, notwithstanding the application of the door to the lower end of the dipper, and so that when the door is free to swing to open position, it Will clear the line of discharge of material from the dipper. But according to the present invention, each hinge arm 3 is designed with an L-shape or equivalent section, providing anges 3 perpendicular to the door and ianges`3b parallel therewith, and thereby affording substantially transverse dimensions in both said 2 mainly through the medium of an angular socket 7 composed of a web 7 which is` deep in the direction perpendicular to the plane of the door, and which terminates in lip 7b parallel to the plane of the door and adapted to engage the perpendicularfflange 3 and confine the hingearm 3 to the door in said perpendicular direction; also a web 7 likewise perpedicular to the plane lof the door but laterally offset from and of substantially less depthv than the web 7 and engaging the parallel leg 3:of the hinge arm 3, and, in cooperation with the web 7, con- Each arm is united to the door inthe plane of the door. Moreover, web 7 .than that of the web- 7,

decreases in heighttoward the free end of the door, so that the lip 7b converges toward the face of the door, andv web 7c converges toward the web 7a in said direction; hence, the angular socket afforded by the members 7, 7", 7c, and the conforming lines of the hinge arm constitute a wedging fit between the hinges and the door which renders the assembly very accurate 'and secure, and, in

`a measure, enables the hinge arms to lend still greater stiffness Vto the structure of the door, with consequent decrease in the permissible thickness of the door without going beyond the margin of safety. A material advantage in having the dimension of the lip 7b less than the spacing between the webs 7 a, 7 c, and having the depth of the web 7-c less is that the inner faces and angles of these members are fully exposed for the grinder in finishing the castings of which they are made, thus making the construction especially adapted for product-ion lfrom manganese steel; and it also opens up the faces of the perpendicular and parallel flanges of the hinge varm for the application of securing bolts.

'To prevent longitudinal displacement of the hinge arm 3 from the door 2, bolts 8 and 9 are employed, some of which pass through the wall of the door and the parallel flange .3b of the hinge arm, while the others pass through the perpendicular web 7a of the socket and the perpendicular flange 3 of the hinge arm. But these bolts, being relieved by vthe angle sockets from all but shearing',-

strains in the longitudinal direction of the hinges, need be very much less numerous thanl rivetswhich alone are relied upon to take all the stresses set up between the door and the hinges .in service; moreover, such securing means, under the conditions ofthe present invention, being in the form of bolts with releasable nuts, provide for convenient assembly andl disassembly of the door with its hinges in a fraction of the time that it takes to cut away the heads of rivets or burn them out with the torch.

- by cross web 10 Obviously, the webs 7 and 7 constitute very substantial elements of strength for the doory 2, and admit of the latter being made' of much lighter design, than when its plate section is largely or wholly relied upon to sustain it against distortion; and in order to render theA webs 7 still more effective as stil'ening elements, they are connected near their ends toward the hinge intles, and with a transverse web 11 at their outer ends. The webs 7, 1 0, and 11 constitute a s'ubstz'mtiallyl rectangular frame integral with and enclosing such a substantial area of the plate 'dimension or the area of the door 'as to render the door rigid and proof against distortion. and conthrough an opening as well as. readily reversible in sequently very much less liable to the development of crackswhich ultimately render it useless.

Webs 7', 10, and 11 afford a convenient and substantial mounting mechanism of a doory of the kind described', 'web 10 being constructedwith a guide opening 12 to receive the inner end of the latch bar 5 and having lugs. 13 carrying an antifriction'roller 14 to resistwear of the latch bar in its said guide; and the cross web 1l being united with upstanding cheeks' 15 carrying anti-friction roller 16 and constituting a guide for the outer end of the latch bar 5. The load of the door 2 is imposed upon the latch bar 5 through the medium of the pillow block 17 confined between the cheeks 15 held against displacement by pins 18 (Figure 2), and this pillo-w block is made readily replaceable so that the ddoor can be held tightly closed at all times.-

To operate the latch bar 5, a lever 19 pivoted at 20 upon an adjustable post 21 supported on one of the cheeks 15, is passed 22 in-the latch bar 5 and has its outer end brought under control of the pullcord 23, a spring 24 being introduced between the latch lever19 and a fixed point 25 in order to normally hold the lever and, through it, the latch bar in keeperengaging position. 26 represents a limiting stop ably formed integrally on dicular socket webs 7.` This limiting` stop engages the latch lever 19 at both limits of its movement and ybecomes the means for defining the throw of the latch bar 5, and thereby admits of the latter being made in oneof the perpenthe form of a straight piece (as shown in Figure 6) without shoulders or internal angles, and therefore well adapted for cheap production from hard and durable material position, and consequent double duration in use.

In order to render the latch bar 5 reversible as stated, its opposite ends are alike designed with calnming bevels 5a; and in.

order to maintain accuracy of control of the latch lever 19, the opening 22, through which said lever passes, 1s duplicated at' 22 so that when the end of the bar in workingl position, as well as the opening 22, has befor the latching in the form of a box or trough, preferloo come worn 1n use until it is no 'longer safe, 1

it is simply necessary to turn the bar end for end and introduce the latch lever 19 into .the second opening 22. -ba 5 is square, and the openings 22, 22,

The section of the as well as the bevels 5* of t e latch bar are disposed at 90" angle of rotation from each other in order that faces which receive wear when one end 4of the'latch bar is in lserv1ce,

namely, those faces which allel to thef plane of the door and against their supports under very great friction, will become the sides of the latch bar impinge 1,eea,eao

in the reversef position, and thus leave avail' able an original thickness of bar at the new end to hold the door in its proper relation.

I claim:

1. In a dumping receptacle, a door constructed with webs spaced in the direction of the plane of the door, and a hinge arm fitting between said webs 'and confined thereby .against lateralv displacement in the plane of the door;one.of said webs being provided with a arm and confining the same to the door 1n the direction perpendicular to the door.

2. 'In a dumping receptacle, projecting perpendicularly to said door and carrying an overhanging, lip, a hinge arm bearing a ainst said we and confined be tween sai lip and the door, and a second web perpendicular to the door, spaced from the rst web and coniinin the hinge arm to a position against' the we first named and beneath said lip; the lip beingof less dimension than the space between the perpendlcua position against lar webs and leaving a substantial portion of the arm-receivingspace exposed.

3. In a dumpinghreceptacle, a door, a web projecting perpen cularly to said door and carrying an overhangin lip, a hinge arm bearing against said we and confined between said lip and the door, andA a second web rpendicular to the door, spaced from the st web and conlinin the hinge arm to beneath said lip; less depth than the first web and leaving exposed a substantial area of the {i1-st web adja cent its lip. Y

4. In a dumping receptacle, a door, a hinge arm for mounting said door upon said rcep? tacle, webs perpendicular to the-plane o p door and spaced apart thereon to receive the hinge arm between them, and boltspassing in one direction through the door and the hinge arm., and in another direction through i one of the webs and the hi e arm.

5. In a dumping receptac e, a door, a hinge arm for mounting the door u n the rece l hinge arm an tacle, said hinge arm being o substantie y L-shaped-section, a web perpendicularto the door reeeivin a perpendicular face of the ,of webs integral with,exten lip` over-hanging the hinge a door, a web' the we first named and the second web Fbeing of p having means for securing itthereto, and securing means a portion of thearm paralle thro h said door. i

6. n a dumping receptacle to the door and a door, a pair gx from, and substantially per ndicular to t e plane of said door, each o said webs and an adjacent portion of the door to ether forminga hinge mounting of L-sha section, adaptedto receive a separately the hinge against relative" movement in at least two directions, and a webalso integral with, extending from, and substantially perndicular to the plane lof said door, unit mg the webs first named; said pair of webs assing' I formed hinge 4and confinel and the uniting web together providing a strengthening frame uponthe door. l

7. .In a dumping receptacle,'a .door longi-v tudinal webs pro3ecting from the p ane 'of the' door and formed integral therewith, integral transverse webs uniting said longitudi' nal webs, a latch bar mountedto slide in transverse webs, a latch lever engagingsaid latch bar, and a rlimiting stop mounted on one ofthe longitudinal webs inposition to engage the end of said'latch lever.

`8. In a dum ing receptacle, a door, a latch bar for loc g said door, a latch lever controlling said latch bar, a limiting stop defining the stroke of said latch lever, and a fulerum for said latch4 lever adjustable to chan the position of .the latch bar.

a 'dumping receptacle, a door, cheeklates upstandmg from said door, a keeper, a latch bolt, coniined' between said cheek lates win ition to cooperate with said eeper, sai latch bolt being adapted to enter between said cheek-plates with either end presented'to `thelree r and in either oftwo positions at 9Q :m: of revolution' to each other, and means carried b said latch bolt and through which it is a apted to be enin either of its ga itions, to operate it; the ends of the latch lt being fashioned so that they wi1l,.respectively, cooperate with the keeper only when it is confln said cheek plates in its respective positions of rotation.`

signed t chicago Heights, this 26th day of December 1924. Y A Jorm ofArLoN cnam;v 

